Solution Found!
Polling. As mentioned in the chapter,
Chapter 14, Problem 29(choose chapter or problem)
Polling. As mentioned in the chapter, opinion-pollingorganizations contact their respondents by sampling ran-dom telephone numbers. Although interviewers now canreach about 76% of U.S. households, the percentage ofthose contacted who agree to cooperate with the surveyhas fallen from 58% in 1997 to only 38% in 2003 (PewResearch Center for the People and the Press). Eachhousehold, of course, is independent of the others.a) What is the probability that the next household on thelist will be contacted but will refuse to cooperate?b) What is the probability (in 2003) of failing to contact ahousehold or of contacting the household but not get-ting them to agree to the interview?c) Show another way to calculate the probability in part b.
Questions & Answers
QUESTION:
Polling. As mentioned in the chapter, opinion-pollingorganizations contact their respondents by sampling ran-dom telephone numbers. Although interviewers now canreach about 76% of U.S. households, the percentage ofthose contacted who agree to cooperate with the surveyhas fallen from 58% in 1997 to only 38% in 2003 (PewResearch Center for the People and the Press). Eachhousehold, of course, is independent of the others.a) What is the probability that the next household on thelist will be contacted but will refuse to cooperate?b) What is the probability (in 2003) of failing to contact ahousehold or of contacting the household but not get-ting them to agree to the interview?c) Show another way to calculate the probability in part b.
ANSWER:Step 1 of 5
(a) Given
Probability of household is contacted =76%=0.76
Probability of persons contacted to cooperate 38%= 0.38